Stockholders Equity - Narrative (Detail) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	1 Months Ended	3 Months Ended
	Nov. 01, 2022	Sep. 30, 2022	Sep. 30, 2021
Stockholders Equity [Line Items]
Stock repurchase program, authorized amount		$ 4,000.0
Shares repurchased		$ 250.0	$ 250.0
Class A and Class B Common Stock
Stockholders Equity [Line Items]
Shares repurchased		8.0
Shares repurchased		$ 250.0
Remaining buyback authorization amount		$ 1,150.0
Class A and Class B Common Stock | Subsequent Event
Stockholders Equity [Line Items]
Shares repurchased	1.7
Shares repurchased	$ 50.0
Class A Common Stock
Stockholders Equity [Line Items]
Cash dividend per share (in dollars per share)		$ 0.25	$ 0.24
Class B Common Stock
Stockholders Equity [Line Items]
Cash dividend per share (in dollars per share)		$ 0.25	$ 0.24